The Decemberists, 'The Infanta' (Season 2, Episode 6)
It's fitting that an episode centered around the idea of womanhood and its trappings would begin with a montage of Betty Draper (January Jones), Joan Holloway (Christina Hendricks), and Peggy getting ready in the morning. Betty adjusts her prim white underthings; Joan pulls on a blue slip over a black bra; and Peggy, somewhere in between the Marilyn-Jackie dichotomy the episode sets up, dons modest stockings and a slip. The sequence is offset by one of the rare instances of contemporary music being used on the show: The Decemberists' thundering track from 2005's Picaresque. The song, about a woman being worshipped in ancient times, is a stark contrast to the women of Mad Men trying to find their footing as the world changes around them.